The term "under-studied" refers to a topic, subject or area of study that has not received enough attention, research or investigation. Its antonyms, on the other hand, are words that express the opposite meaning, that is, over-studied or well-researched. Some examples of antonyms for under-studied are extensively studied, thoroughly investigated, extensively researched, extensively explored, and heavily analyzed. These words imply that a specific topic or subject has been studied, researched, and analyzed in great detail, providing vast knowledge and understanding about the particular issue. It is important to address under-studied topics, but it is equally important to recognize and appreciate the well-researched subjects that have contributed greatly to our knowledge and understanding.